The last was several years later in early September just before Graham went back to boarding school. By then it was just the two of us in the tree house and I let Graham, unusually, take my knickers down as it would be the last time for a while (for ever it turned out). He didnt spank me very hard, just enough for a bit of a sting and tingle. I was too young to understand exactly why I found all this exciting rather than unpleasant, but have replayed it in my mind a thousand times.